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Old 09-05-2004, 07:51 PM   #1 (permalink)
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Can you weld cast aluminum?

Can you weld cast aluminum?If so would it be a good idea to weld my timing cover?Would it be as strong as before?Or would i be asking for more problems?

My neighbor has an old offy intake for his vette with 3 deuces and he had it welded and its held so far but this is a whole different part of the motor you know?

Any suggestions?
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Old 09-05-2004, 08:22 PM   #2 (permalink)
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Can you weld cast aluminum?

Yep...I fired up the TIG the other day and welded mine back together. Worked like a charm.

Just make damn sure it's 150% clean. That means wash it, get ALL the oil off, then hot water with no soap. Don't use mineral spirits to clean it, it tends to get into the pores of the crack/break and plays hell with a quality weld bead. Acid washing works too--just make sure you use hot water to get all the acid off and dry it well.

aluminum absolutely hates any type of non-aluminum alloy compounds in it during welding.
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Old 09-06-2004, 02:29 AM   #3 (permalink)
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Can you weld cast aluminum?

Use only a stainlees wire brush, no regular steel. It better be clean. Sandlast it!, stay off the gasket surfaces.
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Old 09-06-2004, 03:15 AM   #4 (permalink)
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Can you weld cast aluminum?

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Just make damn sure it's 150% clean.
at a bare minimum. yes you can weld aluminum, and tig welding is the prefered method. if you have little or no welding experience, get in touch with a pro and have them do it, the life you save might be mine
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Old 09-06-2004, 05:46 AM   #5 (permalink)
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Can you weld cast aluminum?

Cast ally welds like a chocolate aero bar, nasty nasty stuff, clean it real well with brake cleaner white spirits etc then clean it again, solvents are a must to leach out any oil, oterwise it's like trying to paint over silicone
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Old 09-06-2004, 12:04 PM   #6 (permalink)
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Can you weld cast aluminum?

Quote:
On 2004-09-06 03:15, rbohm wrote:
Quote:
Just make damn sure it's 150% clean.
at a bare minimum. yes you can weld aluminum, and tig welding is the prefered method. if you have little or no welding experience, get in touch with a pro and have them do it, the life you save might be mine
I had no intentions what so ever of welding it myself.We have some kick ass welders in this town so i figured id take it to a local shop.

But im at a fork in the road and am not sure what to do ive heard that aluminum is not a very good candidate for it and that you only do more damage so im lost.If i cant find one ill just buy the one from summit i guess for 139.00 part number FMS-M6059-D351.
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Old 09-06-2004, 03:53 PM   #7 (permalink)
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Can you weld cast aluminum?

Yes, it can be welded. I'm going for machining and welded a cast aluminum case on a dirt bike motor, kind of put a hole in it when the piston broke and a piece got lodged between it and the crank. The key is getting all the oil out of the pores. The best way is to cook it in an oven at I believe it is about 500 degrees for a few hours, but I can't remember the temp for sure, but it was way up there for aluminum. Then take it out of the oven and weld it hot, then put it back in the oven and turn it down and slowly turn it off. If done right it will be stronger than before it was welded.
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